Electric forge



(No Model.) 3 SheetsSheet 1. G. D. BURTON & E. E. ANGELL.

ELEGTRIG FORGE.

No. 496,594. Patented May 2,1893.

/fl :T- I "l I 0 I .94? l I I l O Q I O Mwlcssas. g lrh/ hm ew 5 (No Model.) 3 Sheets-Sheet 2. G. D BURTONXz E. E. ANGELL. ELECTRIC FORGE No. 496,594. Patent-ed May 2, 1893.

W ma I W u M w a 1 ii, 6 m w l W H (No Model.) 3 Sheets-Sheet 3.

G. D. BURTON 81; E. E. ANGELL. ELECTRIC FORGE.

No. 496,594. Patented May 2, 1893.

WITNEEEEE- IN UNITED STATES PATENT OFFICE.

GEORGE D. BURTON, OF BOSTON, AND EDWIN E. ANGELL, OF SOMERVILLE, MASSACHUSETTS, ASSIGNORS TO THE ELECTRICAL FORGING COMPANY,

OF MAINE.

ELECTRIC FORGE.

SPECIFICATION forming part of Letters Patent No. 496,594, dated May 2, 1893.

Application filed May 3, 1892. Serial No. 431,734. (No model) To all whom it may concern:

Be it known that we, GEORGE D. BURTON, residing at Boston, in the county of Sufiolk, and EDWIN E. ANGELL, residing at Somerville,in the county of Middlesex, State of Massachusetts, citizens of the United States of America, have invented certain new and useful Improvements in Electric Forges, of which the following is a specification.

This invention relates to an electric forge for heating bars of metal by means of electric currents preparatory to forging, working, or tempering them.

The object of the invention is to provide a massive forge capable of conducting heating currents of large volume without itself becoming heated.

The object of the invention isfurther to provide means for adjusting the clamps with facility so as to secure an even pressure of the bar at the opposite poles or points of electric contact, and also to provide means for quickly and easily manipulating both clamps at one operation to grasp and release the work.

Figure 1 of the accompanying drawings represents a plan of this improved electric forge, and conductors leading therefrom to the current converter for supplying the heating current. Fig. 2 represents a perspective view of this improved electric forge. Fig. 3 represents a vertical central section through one of the standards thereof.

The same reference numbers indicate the same parts in the different figures.

The frame of this improved electric forge comprises two end standards and 20, composed of copper or other suitable conductive material. The standard 10 comprises two vertical parallel side webs 11 and 12, a bottom plate 13, and a top plate let. An intermediate horizontal partition 15 connects said vertical webs. The top and bottom plates project laterally on opposite sides of the standard. The standard is provided with a leg 16 extending downward from the bottom plate, and said plate is provided on its upper face with a transverse rib 17. Two vertical rods 18 and 19 extend through the top plate 14 and 50 through the partition 15 and rest in sockets in the rib 1'7. These rods serve as guides on which the movable jaws of the clamps play. The standard 20 is of similar construction to the standard 10, and need not be herein specifically described.

Two jaws and 31 are guided by means of holes in their shanks on the rods 18 and 19 respectively, and project in opposite directions from opposite faces of the standard 10.

Adjusting screws 32 and 33 pass through screw-threaded holes in the bottom plate 13 and enter sockets in said jaws and serve as means for adjusting said jaws into higher or lower positions. These jaws SO and 31 are provided with removable contact clamping faces 34 and 35 respectively, said clamping faces being dovetailed into the bodies of said jaws, and provided at their inner ends with upturned flanges 36 and 37. These contact faces may be composed of copper, carbon, or any suitable conductive material or composi tion, and replaced when they become worn.

Blocks 40 and 11 are adjustable on the rods 18 and 19 just below the top plate 14, being provided with holes in their shanks through which said rods pass. These blocks are adjustable higher or lower to a limited extent by means of adjusting screws 42 and 43 which pass through screw-threaded holes in the top plate and engage said blocks. Movable clamping jaws 50 and 51, which serve as companions respectively to the jaws 30 and 31 are also disposed on the rods 18 and 19 below the horizontal partition 15.

A pair of toggle levers II and 45 connects the block 10 with the movable jaw and a pair of toggle levers 4:6 and 47 connects the block 41 with the movable jaw 51. Thejaws 50 and 51 are provided with removable contact faces 52 and 53, which are also composed of copper, carbon, or other suitable conductive material or composition.

Bent levers and 61, provided with insulated handles 62 and 63 are pivoted in cars projecting from the top plate let, the lower ends of said levers terminating in the same, or substantially the same horizontal plane with the toggle joints 48 and 49 of the pairs of toggle levers. A link 65 connects the toggle joint a9 with the lower end of the bent lever 61, and a corresponding link,which does not appear in the drawings,connects the toggle joint 48 with the lower end of the bent lever 60.

The standard 20 is provided on one side with an adjustable lower jaw 71, similar to the jaw 31 of the standard 10, and with a movable jaw 81, corresponding with the movable jaw 51 of the last named standard. The opposite side of the standard 20 is also provided with a pair of clampingjaws, corresponding with those on the same side of standard 10. The lower jaws of this standard are adjustable in the same manner and by similar means as the lower jaws of the standard 10, and the upper movable jaws are connected and operated in the same manner and by similar means as the upper movable jaws of the standard 10, said means, including bent levers 90 and 91, provided with insulated handles 92 and 93. An insulating rod 94 connects the lever of the standard 10 with the lever of the standard 20, and a similar insulating bar 95 connects thelever 61 of the standard 10 with the lever 91 of the standard 20.

The standards 10 and 20 are connected in any suitable manner with the opposite poles of an electric current converter or other de- Vice, for supplying heavy heating currents.

The drawings show a segment representing one pole of the electric converter,

and a segment 110 representing the other pole thereof. A conductive bracket 101 is connected with the segment 100, and a conductive bracket 111 with the segment 110. A series of bars 102103-104 and 105,composed of copper, or other'suitable conductive material, and conductively connected together, connects the standard 10 with the segment 100, the outer end of the bar 105 being provided with a clamp 106 which engages theleg 16 of said standard. The other standard is likewise connected with the segment 110.

In the use of this improved electric forge a bar-as 200to be heated is placed on the jaws 31 of the standard 10, and 71 of the standard 20. One of the bent'levers 61 or 91 is then swung toward the right, whereby the toggle levers are straightened and themovable jaws 51 and 81 are made to clamp said bar. When the bar is so clamped, the current passes from the standard 10 through the jaws 31 and 51 into the bar 200, through that portion of the bar spanning the space between said jaws into the jaws 51 and 81, and

thence through the conductors to the ring 110 of the converter. tion of the bar between the two pairs .of jaws, causes a heating of the bar, which quickly rises to a forging temperature. When the The resistance of that por- The current can be utilized on both sides of the forge for forging two bars at the same time.

The adjustment of the lower jaws adapts them to bars of different thicknesses, and the connection of the actuating levers enables the bars to be grasped with uniform pressure at both the conducting clamps.

We claim as our invention 1. In an electric forge, the combination of two standards connected with opposite electric poles, jaws in said standards, means for adjusting said jaws, movable jaws supported in said standards, toggle levers connected with said movable jaws, and actuating levers connected with the toggle joints of said toggle levers.

2. In an electric forge, the combination of two standards connected with opposite electric poles, jaws in said standards, means for adjusting said jaws, movable jaws supported in said standards, toggle levers connected with said movable jaws, actuating levers connected with the toggle joints of said toggle levers, and an insulating bar connecting said actuating levers, whereby they move in U111- son.

3. In an electric forge, the combination of a standard composed of conductive material comprising two side plates, top and bottom plates, a vertical rod connecting said top and bottom plates, jaws guided on said rod, means for adjusting one of said jaws, a block also guided on said rod, toggle levers connecting said block and one of said jaws, and means for operating said toggle levers.

4. In an electric forge, the combination of a standard composed of conductive material, comprising two side plates, top and bottom plates, a vertical rod connecting said top and bottom plates, jaws guided on said rod, means for adjusting one of said jaws, a block also guided on said rod, means for adjusting said block, toggle levers connecting'said block and one of said jaws, and means for operating said toggle levers.

5. In an electric forge, the combination of two standards connected with opposite electric poles, jaws in said standards, movable jaws supported in said standards, toggle levers connected with said movable jaws, and actuating levers connected with the toggle joints of said toggle levers.

6. In an electric forge,'the combination of two standards connected with opposite electric poles, jaws in said standards, movable jaws supported in said standards, toggle levers connected with said movable jaws, actuating levers connected with the toggle joints of said toggle levers, and an insulating bar connecting said actuating levers, whereby they are moved in unison.

GEO. D. BURTON. EDWIN E. ANGELL. Witnesses:

CHESTER MAKE, A. O. LADD. 

